Molding-machine.



.man nnLLnr., or BALTIMORE, MAnYLanzo.

MOLDING-MCHINE.

:arranca specifieatiqn of Letters Patent.

- Patented ct. 13, 1914.

Application led J une 15, 1914. Serial No. 845,190.

To all whom t may concern: I

Be it known that I, ADAM HELLER, a c1t1- zen of the United States, residing in Baltimore city and State of Maryland, have 1nvented certain new and useful Improve-l ments in Molding-Machines, of whlch thev following is a specification.

This invention 'relates to molding machines and pertains to the class of machines for molding pipe, and particularly to such machines as employ sand dropping mechanism' and a sand packing roller.

lThe object of t e invention is to provide novel and dropping sand, and for packing sand into sand dasks.

A further object of the invention is to provide special mechanism for operating the doors of a sand box in dropping sand from thebox into the sand flasks.

With these and various other objects, advantages, and improved results in view, the invention comprises, essentially, a roller operated sand packer; a combined roller track and swinging sand packer; means contained in the sand hopper and coperating with a sh-akin screen for spreading the sand during the sifting thereof; and mechanism for controlling the doors of the sand box.

The roller having weights to govern the. pressure on the sand packer, and the special construction of the roller, are covered by my allowed application` Serial No. 666,966, in which the present application is in part a divisional application, therefore the above mentioned features will not be specially claimed herein, and will `only be shown and described for the purpose of carrying out this invention.

In' the accompanying drawings forming p art of this application: Figure 1 is a top' view, the conveyer being partly broken away. Fig. 2 is a central vertical section showing the movement of certain parts in dotted lines. Fig. 3 is a sectional elevation of part of the machine, the'dotted lines showing the roller at rest. Fig. 4 is an end view showing the movement of the roller track and presser in dotted lines. Fig. 5 is a detail elevation of the door locking levers. Fig. 6 is a side view of the roller partly --broken away. Fig. 7 is a perspective view view of the sand box. v

of one end of the combination packer and track. Fig. 8 is a perspective lview of one of the hopper plates.

IFig. 9 is a bottom plan peculiar means for sifting and.

vscreen-sieve or mesh The same reference characters denote the same parts throughout the several views of the drawings.

The frame 1, the conveyer 2, the sand flask 3, the molding carriage 4, the sand hopper 5, the screen box 6, the sand box 7, and the shaft 8, with its connections for operating the screen or sieve, are all substantially of. the ordinary type usually employed in such machines. The hopper 5 is provided with stationary plates 9 having lateral projections 9a at the top thereof, and said project-ions lextend over the top edge of the sides of the screen-box 6, and are attached to the hopper so' that the box 6 cated by the driven crank-shaft 8, in the may lbe recipro box 6, so as to leave a sand space between the side edges of the plate and the sides of said box, and a sand space between the 10, and the bottom edge of the plates. The plates 9 are set at an angle across the hopper so as tospread or divide the sand in the screen-box into three or more bodies according to the number of plates used, all of the plates direct the sand to the screen. This arrangement produces more uniform distribution of the sand to the screen, the clogging of the screen is avoided, and the sand is afforded free passage to the screen. f

The cut-off 11 is operated by a hand-rod 12 having a pair of levers 13 pivoted to the fra-me 1, and said levers are fulcrumed to the cut-oif by a pair .of links 14. A stop-lng 15 is secured to the frame and engaged by one of said levers to limit the outward movement of the cut-ofi'. The inward movement of the cut-ofi'l is limited by the upturned edge 16 of the cut-off.

The sand box 7 has a drop-door 17, the halves of which are hinged to each side of the box, and the free edges of the door overlap each other in closed position centralb of the box. Each door is weight 18, sufficient to overcome the weight of the doors in open position, for closlng them. Thedoors are locked in closed position by means of a pair of levers 19, pivoted to the frame l, and connected together by a bar 20, and said levers have a notch or slot 21 in the free end thereof, and such end depends into thepath of movement of a pair of keepers. 22 projecting from one half of the door across the other half of the door for engaging `the notches ,21. It is obvious provided with a I that the doors are held in closedposition by the levers 19 during the filling of the sand box, and thatthe levers are swung out of engagement with the keepers 22 to open the ,doors for dropping the sand.

The means for packing the sand into the .sand flask comprises a weighted roller 23, having an operating handle 23, and a combined packer andftrack for the roller. The

roller is hollow,.and is mounted on a shaft 25, extending therethrough, and the roller has end iianges 26 of such depth as to overlap the sides of the track so as to prevent lateral movement of the roller. In order to vary the weight of the roller and its pressure onthe track 24, ,I provide the roller uwith weights 27, one or more of which Vmay 'be hung on the shaft 25, and the roller isA .provided with a removable section or door, 28, to permit the weights to beplaced andl removed as desired or as occasion may. de-

vmand. v Obviously the number of Weights may be increased or diminished -according tothe pressure required on the packer.

The roller track 24 is formed on or attached tothe top of the packer 29, by means of a central web of the same Width as the roller length between the roller anges 26, so as to prevent lateral movement of 30 the roller, and said web is of sufiicient depth as to elevate said flanges above the top of the packer. The under face of the packer 29 is provided with a plurality of cleats, projections or blocks 32, so arranged rela-y '35 tive to each other and to the sand flaskopenings 33, as to fit and, pack the sandV into saidr openings when the roller is operated on the track 24. A pair lof levers 34 are pivoted at 35 to the ends of the web 30, '40 and also pivoted at 36 to the frame 1. -.The pivots 35, permit the packer to adjust itself to the flask opening 33, and the levers 34 are operated by a hand lever 34a. and a lever 35a for raising and lowering the packer.

, The packer is prevented from tilting outwardly when raised out of packing position, by the ends of the track engaging the edge of the levers, so that the packeris held m substantially vertical position and out of interference during the operation of charging the sand ask. The packer being pivotally hung, the weight of the roller on the track will balance the packer and force it into proper' packing position so as to make the packer blocks 32 register with the sand iilledopenings 33. In order to hold the roller in position Jfor operation I provide the frame 1, with a pair of arms 37, forming a support for the roller, and having.

abutment ends 38. When the roller is at rest on the arms the roller handle is dropped over the abutments and prevents the roller from accidentally leaving the arms. Dur-z ing the deposit of the sand into the sand flask, the packer is held in suspended posi-V tion, and the roller is held by the arms 37, and after such deposit, the packer is dropped into position, and the roller is rolled upon the packertrack.

I do not wish to be understood as conlining myself to any particular material, number, size or shape of the' various parts of my invention, to any special style or form of frame, nor to any particular means for imparting motiony to any of the arts of this apparatus, as certain or` all o such parts ma 1 be operated by suitable motive power or y hand, as lmay be desired.

Having thus described my invention what I claim as new and desire` to secure by Letters Patent is 1. In a molding machine, a sand hopper,

.a screen box, and a plurality of diagonally arranged plates secured Within the hopper and depending into the box for dividing the sand contained inl the box `into separate bodies.

2. In 'a molding machine, a sand box,

Asand-dropping doors hinged to the box keepers secured to one ofthe doors an projecting beyond the hinged edge of the other door, and means engaging the projecting ends of the keepers for holding the doors in closed position.

3. In a molding machine, a sandbox,- 9`5 sand-dropping doors hinged to the box, a. slidable cut-oli for controlling charges of sand to the box, kee ers secured to one of the doors and projecting beyond the hinged edge ofthe other door, means engagin the projecting ends of the keepers for hoding the doors in closed osition, and means operated by the cut-o for opening the doors.

4. In a molding machine, a sand box, a pair of gravity swinging doors for opening and closing the bottom of thel sand box, means for locking and releasing the doors, levers pivoted to the frame of the machine, a hand rod connecting the levers, links connecting said levers with the slide for operating the slide, and a sto on` the frame and engaged by the levers or limiting the outward movement of the slide.

5. In a molding machine, the combination with a flask, and a resser roller, of a sand packer fitting the ask, a roller track mounted on the acker, and a pair of levers having one end pivoted to the machine frame and the other end pivoted to the packer for permitting pivot movement of the acker during the swinging movement of the evers.

6. In` a molding machine, a sand box, a. pair of doors hinged tothe bottom of the box, a lweighted lever .secured to each o f the doors, a pair of keepers attached to one of the doors and .over-lapping the other door, and a pair of connected levers having a slot in the free end thereof for engaging the free' end of the keepers.

7. In amolding machine, a presser roller,

a sand packer havlng a central web, `a pair of levers to which the packer is pivoted for tilting movement, said levers belng pvoted to the machine frame for swinging the paker, and a roller track mounted on the we 8. In a molding machine, a supporting frame, a presser roller, a pair of arms projecting from the frame and forming a rest for the roller, a tilting and swinging packer,

a roller track mounted on the packer and carried into and out of position relative to the said rest by the swinging movement of the packer, and means for connecting the packer with the frame.

In witness whereof I hereunto set my hand in the presence of two witnesses.

ADAM HELLER. 

